How many atoms are in 159g of calcium

What feature of wetlands allows larger particles and chemicals that are adsorbed into the sediment to settle out?

Which term is defined by the amount of a certain isotope that occurs in a natural sample of an element? a) percent abundance b) percent atomic weight c) average atomic mass d) ion abundance

Which is an example of a compound? A. sand B. water C. iodine D. gold

The artificial sweetener aspartame (nutra-sweet) formula c14h18n2o5 is used to sweeten diet foods, coffee and soft drinks. how many moles of aspartame are present in 225 g of aspartame?

What metallic crystal structure has a coordination number of 8? A) Body-centered cubic B) Face-centered cubic C) Hexagonal close-packing D Tetragonal

c. When we heat water up by the Bunsen burner, what temperature is the boiling water? After 10 minutes

Assuming that air contains 78 percent N2, 21 percent O2 and 1 percent Ar, all by volume. How many molecules of each type of gas are present in 1.0 L of air at STP?

Two children are playing tag. Child A who is doing the chasing can run 100m in 24 seconds Child B is running away from child A and can run 64m in 21 seconds.

What ion does a base increase

What is the definition of Amplitude?